AirHint found the following cheapest one-way flights from Boston (BOS) to Frankfurt (FRA) in December 2025 (see full year).

One-Way flights

13 Dec	Icelandair
15 Dec	TAP
20 Dec	British Airways
21 Dec	British Airways
19 Dec	British Airways
16 Dec	United	direct
15 Dec	United	direct
13 Dec	Lufthansa	direct
21 Dec	Lufthansa	direct
19 Dec	United	direct

Also check the deals for return flights from Boston to Frankfurt in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from Boston to Frankfurt in December from 226€

One-Way flights